FloodRadar
Log inCreate free account
5 gauges from Ystradffin No2 River Station to Capel Dewi River Station. None is above its typical high. 8 storm overflows upstream are discharging now. Gauges in Carmarthenshire, Ceredigion; levels are checked every 15 minutes.
Loading the map…
| Station | Level now | Status |
|---|---|---|
| Ystradffin No2 River Station | 0.10 m 47m ago | Within its typical range |
| Dolau Hirion River Station 16.2 km by river | 0.72 m 32m ago | Within its typical range |
| Manorafon River Station 21.1 km by river | 2.10 m 17m ago | Within its typical range |
| Ty Castell River Station 31.4 km by river | 2.74 m 32m ago | Within its typical range |
| Capel Dewi River Station 650 m by river | 2.52 m 17m ago | Within its typical range |
Stations are listed from source to mouth as the water flows, traced on the river map (OS Open Rivers) and the Environment Agency’s own links between its gauges. A distance “by river” is along the river, and is shown only where the map traces the path.
Contains OS data © Crown copyright and database rights 2026.
Streams and rivers with a gauge whose water joins the Tywi above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Joins the Tywi between Ystradffin No2 River Station and Dolau Hirion River Station, no more than 15.8 km by river above Dolau Hirion River Station.
| Doethie Craig Clungwyn | 0.76 m 32m ago | Within its typical range |
Its water passes Dolau Hirion River Station and every gauge below it on the Tywi. It does not pass Ystradffin No2 River Station or the gauges above it.
Joins the Tywi between Dolau Hirion River Station and Manorafon River Station, no more than 20.7 km by river above Manorafon River Station.
| Llandovery River Station | 0.70 m 32m ago | Within its typical range |
Its water passes Manorafon River Station and every gauge below it on the Tywi. It does not pass Dolau Hirion River Station or the gauges above it.
Joins the Tywi between Dolau Hirion River Station and Manorafon River Station, no more than 13.2 km by river above Manorafon River Station.
| Llanwrda River Station | 0.69 m 17m ago | Within its typical range |
Its water passes Manorafon River Station and every gauge below it on the Tywi. It does not pass Dolau Hirion River Station or the gauges above it.
Joins the Tywi between Dolau Hirion River Station and Manorafon River Station, no more than 21.6 km by river above Manorafon River Station.
| Pont Velindre River Station | 0.85 m 17m ago | Within its typical range |
Its water passes Manorafon River Station and every gauge below it on the Tywi. It does not pass Dolau Hirion River Station or the gauges above it.
Joins the Tywi between Dolau Hirion River Station and Manorafon River Station, no more than 11.1 km by river above Manorafon River Station.
| Felin Y Cwm River Station | 0.59 m 32m ago | Within its typical range |
Its water passes Manorafon River Station and every gauge below it on the Tywi. It does not pass Dolau Hirion River Station or the gauges above it.
Joins the Tywi between Manorafon River Station and Ty Castell River Station, no more than 4.3 km by river above Ty Castell River Station.
| Felin Mynachdy River Station | 1.46 m 17m ago | Within its typical range |
Its water passes Ty Castell River Station and every gauge below it on the Tywi. It does not pass Manorafon River Station or the gauges above it.
Joins the Tywi between Manorafon River Station and Ty Castell River Station, no more than 40.5 km by river above Ty Castell River Station.
| Ddol Las River Station | 0.58 m 17m ago | Within its typical range |
Its water passes Ty Castell River Station and every gauge below it on the Tywi. It does not pass Manorafon River Station or the gauges above it.
Below Capel Dewi River Station, its water next reaches Pothouse Wharf River Station, 11.9 km by river downstream.
Tributaries and where they join are traced on the river map (OS Open Rivers, edition 2026-04) and the Environment Agency’s links between its gauges. The map holds distances between gauges, not the junctions themselves, so a junction is placed between two gauges, and no further up than the tributary’s own lowest gauge. Contains OS data © Crown copyright and database rights 2026.
25 storm overflows are traced upstream of Capel Dewi River Station, the Tywi’s lowest gauge on the river map: on the Tywi itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Capel Dewi River Station: 1,639 spills over 16,621 hours in total, across the 19 that have a figure. 6 have no 2025 figure.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Tywi includes the smaller streams that join it there.
Within 3 km of one of the Tywi’s gauges in a straight line, but the river map cannot say whether their water reaches it.
A status is the water company’s own monitor: it says whether an overflow is discharging, never how much or why, and a spill does not by itself explain a change in a river level. A status older than two hours is shown as unknown. Annual figures are the official returns: 12/24-hour spills for England and Wales, overflow events for Scotland (Scottish Water counts differently, so the two cannot be compared). “No data” means the monitor produced no usable data that year, not zero. Overflows are placed on OS Open Rivers (edition 2026-04), which leaves out many small channels: an overflow the map cannot place may still drain here. Contains OS data © Crown copyright and database rights 2026. Sewage in Britain’s rivers →
Live status: © Dŵr Cymru Welsh Water, from its Storm Overflow Map. Annual figures for Wales: Dŵr Cymru Welsh Water’s return to Natural Resources Wales, as compiled by The Rivers Trust, Open Government Licence.
FloodRadar helper · beta